If you are developing html5 games using Phaser library, you might be interested in this Level Editor program built with Phaser too.

This Level Editor called ZKLevedit. With this program you can bring your sprites and tiles into the editor and build your scene/level in it. Then you export the data as json text, then you import that json text into your Phaser game.

All details about how to use this Level Editor described in this video: